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Head to head

Wilson Hollow Core Pro 17 vs Yonex Poly Tour Air 16L

Hollow Core Pro 17 leads on 4 of 6 measurements. The widest gap is ball bite, where Hollow Core Pro 17 is 23 percentile points ahead. Every figure is a testing-machine result at a fixed reference tension.

Measured, side by side

Wilson

Hollow Core Pro 17

Nylon · 17 ga

Yonex

Poly Tour Air 16L

Polyester · 16L ga

Stiffness lower = softer, kinder on the arm
15013th pct
15518th pct
Tension loss lower = stays where you strung it
3455th pct
4169th pct
Energy return higher = livelier, more free power
9165th pct
8846th pct
Spin potential higher = more spin off the string bed
3.927th pct
4.235th pct
Ball bite higher = grabs the ball harder
0.51583rd pct
0.45760th pct
String friction lower = strings slide and snap back
0.13389th pct
0.10874th pct

Bars are percentile against all 791 strings, and the marked side is the one that measures better, which is not always the one you want. A firmer bed is worse for your elbow and better for your control, and no measurement knows which of those you came for.

Which one wins, by problem

Each string's standing on the site's rankings, out of every measured string in the database. This is where a comparison stops being arithmetic and starts being a decision.

Swapping between them: what tension?

Bed stiffness is published at one reference tension, so the only honest conversion is to scale it. These are starting points from 52 lb, not prescriptions. The calculator takes your own tension.

Coming from Hollow Core Pro 17 at 52 lb

String Poly Tour Air 16L at 50.5 lb 22.9 kg

Coming from Poly Tour Air 16L at 52 lb

String Hollow Core Pro 17 at 53.6 lb 24.3 kg

Hybrid: what if you used both?

Estimated, not measured. No hybrid combination has been tested as a bed. These figures are the two strings' own lab measurements weighted by how much of the bed each one actually is. Treat them as a guide to which way a pairing moves, never as lab data.

Hollow Core Pro 17 mains / Poly Tour Air 16L crosses

Stiffness15th pct · 1 measured
Tension loss61st pct · 1 measured
Energy return59th pct · 1 measured
Spin potential29th pct · 1 measured
Ball bite80th pct · 1 measured
String friction86th pct · 1 measured

Poly Tour Air 16L mains / Hollow Core Pro 17 crosses

Stiffness15th pct · 1 measured
Tension loss65th pct · 1 measured
Energy return57th pct · 1 measured
Spin potential33rd pct · 1 measured
Ball bite64th pct · 1 measured
String friction79th pct · 1 measured

Open this in the hybrid builder

Which goes dead first?

Estimated from tension loss, which is the only thing the database measures about ageing. This is when the bed stops playing the way you strung it, not when the string breaks.

Hollow Core Pro 17

~23 hours of play

Poly Tour Air 16L

~19 hours of play

Both strings in full

Every published measurement
StringGaugePriceStiff lb/inLoss %Power %SpinBite COFFriction COF
Wilson Hollow Core Pro 17 Nylon17find15034913.90.5150.133
Yonex Poly Tour Air 16L Polyester16Lfind15541884.20.4570.108

Add a third string Hollow Core Pro 17 in full Poly Tour Air 16L in full